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Taxonomy is how species are scientifically classified. Note, a species is a group of animals that are able to interbreed to produce fertile offspring. Species are organised into groups based on their evol...

Proteins are made up of chains of amino acids. Amino acids are made up of a central carbon atom, joined to one hydrogen atom, an amine group (NH2), a carboxyl group (COOH) and an R group. The R group vari...

Proteins are polymers made of amino acids. Proteins are essential molecules. Among many other roles, they can catalyse numerous reactions within the body (these proteins are known as enzymes), they allow ...

Reflexes are quick and automatic reactions to harmful stimuli. Reflexes are important as they protect the body from harm. We don’t have to learn reflexes because they occur automatically from the moment w...

Neurones are the specialised cells that make up the nervous system. Bundles of neurones are known as nerves. Neurones carry electrical impulses around the entire body.